28287146428 has 12 divisors (see below), whose sum is σ = 49503963600. Its totient is φ = 14143156832.

The previous prime is 28287146417. The next prime is 28287146443. The reversal of 28287146428 is 82464178282.

It is a super-2 number, since 2×28287146428² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88248 + ... + 253696.

It is an arithmetic number, because the mean of its divisors is an integer number (4125330300).

Almost surely, 2^28287146428 is an apocalyptic number.

It is an amenable number.

28287146428 is a deficient number, since it is larger than the sum of its proper divisors (21216817172).

28287146428 is a wasteful number, since it uses less digits than its factorization.

28287146428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208196 (or 208194 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 52.

The spelling of 28287146428 in words is "twenty-eight billion, two hundred eighty-seven million, one hundred forty-six thousand, four hundred twenty-eight".